CN103723940B

CN103723940B - Muck soil composite curing agent and application

Info

Publication number: CN103723940B
Application number: CN201310588224.4A
Authority: CN
Inventors: 徐日庆; 李雪刚; 陆建阳; 畅帅; 俞元洪; 荣雪宁; 朱亦弘; 徐丽阳; 吴勇
Original assignee: NINGBO HIGH-TECH ZONE SEA-CLOSURE ENGINEERING TECHNOLOGY DEVELOPMENT Co Ltd; Zhejiang University ZJU
Current assignee: NINGBO HIGH-TECH ZONE SEA-CLOSURE ENGINEERING TECHNOLOGY DEVELOPMENT Co Ltd; Zhejiang University ZJU
Priority date: 2013-11-21
Filing date: 2013-11-21
Publication date: 2016-03-30
Anticipated expiration: 2033-11-21
Also published as: CN103723940A

Abstract

The invention provides a kind of GX08 muck soil composite curing agent, by unslaked lime: 21.5 ~ 23.0%, sodium carbonate: 8.2 ~ 8.7%, water glass: 29.0 ~ 30.0%, plaster stone: 28.0 ~ 29.0%, trolamine: 0.4 ~ 0.5%, high efficiency water reducing agent FDN:11.3 ~ 11.6% forms.Solidifying agent of the present invention according to different organic content, by adjusting the addition of self and coordinating the solidification effect that different cement mixing contents reaches best, can be applied to the process of all kinds of organic matter soft soil ground.The present invention has the advantages such as water stability is good, good frost resistance, early strength are high, stable long-term strength, can be applicable to all kinds of organic matter soft soil basement process, reaches best solidification effect and economical effectiveness.

Description

Muck soil composite curing agent and application

Technical field

The invention belongs to building material field, relate to a kind of for mucky soil solidifying agent, particularly relate to a kind of GX08 muck soil composite curing agent, the solidification treatment with the mucky soil of different organic matter contents and high-moisture can be applicable to.

Background technology

Solidifying agent is that one with the addition of various chemical composition, with soil generation series reaction in the soil body, the physicochemical property of the soil body is significantly improved, and the water sensitivity of soil can also be made to reduce, and water stability improves simultaneously.Many scholars are devoted to the research of solidifying agent, enable the reinforcing being applied to all kinds of foundation soil, also can according to the intensity needing the adjustment soil body in engineering.The application of solidifying agent can make cement and sandstone volume reduce, and saving construction cost, reduces the destruction to environment, and this has positive effect to the protection of sustainable development and ecotope.

Soil consolidator of a great variety, can be divided into mineral compound class, organic compound class, biological enzyme, compound solidifying agent etc. by its main component.In recent decades, solidifying agent application is at home and abroad more and more extensive, pursues the requirement of engineer applied and environment protection on the one hand, also reaches on the other hand and saves economic effect.In civilian work basis is as roadbed, foundations construction, be cured agent reinforce, can bearing capacity of foundation soil be improved, also make obviously to be reduced the use of high cost material; Secondly, be cured process at the mud dredged river, lake etc., it can be made to turn waste into wealth, make it to reach some strength, be applied to the other sides such as roadbed filling.In recent years, existing many investigators have developed different soil body solidifying agent for different soil property both at home and abroad, also achieve many achievements in research.Chinese scholar adopts various solidify material to carry out Study on curing to the soil body of different qualities, also achieve some achievements in research, achievement in research mainly comprises the research of cement solidification soil, lime solidified earth, silica flour solidified earth, industrial waste class solidified earth, water glass solidified earth, ion-exchange class solidified earth, high score subclass solidified earth and NEW TYPE OF COMPOSITE class solidified earth aspect.At present, the characteristic for regional mucky soil high organic content is studied, thus cost of development is low, superior performance and the solidifying agent of easy construction, is a scientific research difficult problem in the urgent need to address.

Premature curing agent research is mainly continued to use the materials such as cement, lime, flyash and is carried out independent or mixing cured, these solidifying agent have early strength low, can not according to flexible soil strength and the shortcomings such as water stability difference in the length of time.In the soil body of high-moisture and high organic content, the use of solidifying agent, less effective.

Summary of the invention

The object of the present invention is to provide a kind of GX08 muck soil composite curing agent of economical rationality, superior performance, GX08 can according to different organic content, by adjusting the addition of self and coordinating the solidification effect that different cement mixing contents reaches best, the process of all kinds of organic matter soft soil ground can be applied to.

Each component of GX08 muck soil composite curing agent provided by the invention consists of by mass percentage:

Composition quality composition %

Unslaked lime: 21.5 ~ 23.0

Sodium carbonate: 8.2 ~ 8.7

Water glass: 29.0 ~ 30.0

Plaster stone: 28.0 ~ 29.0

Trolamine: 0.4 ~ 0.5

High efficiency water reducing agent FDN:11.3 ~ 11.6

Each component percent and be 100%.

Instant component coordinates silicate cement one to work enhancing soil strength, and wherein unslaked lime, water glass and sodium carbonate are alkaline excitation component, and plaster stone is expansion component, and trolamine, high efficiency water reducing agent FDN are tensio-active agent.

Another object of the present invention is to provide the application of GX08 muck soil composite curing agent in the process of organic matter soft soil solidification of the foundation.

Composition quality composition in GX08 is as implied above, determine the optimum formula of GX08 thus, i.e. plaster stone: unslaked lime: sodium carbonate: water glass: trolamine: FDN water reducer=28 ~ 30:21.5 ~ 23:8.2 ~ 8.7:29 ~ 30:0.4 ~ 0.5:11.3 ~ 11.6.Cement mixing content is not forgiven in GX08, in Practical Project, by adjusting the additive ratio of cement and GX08, solidifies the weak soil of different organic matter contents, to reach maximum solidification effect and economical effectiveness.

The solidification countermeasure of solidifying agent of the present invention is according to mucky soil feature, respectively from strengthening early strength, regulating the angle Selection solidify material of the activity of soil electrostatic double layer, improvement and promotion hydrated cementitious and setting and harden, adjustment cement ion, raising P in soil H value and clay particle, and apply response surface experiments to determine the composition of each composition, make each moiety reach best solidification effect and economical effectiveness by series reaction.The present invention has the advantages such as water stability is good, good frost resistance, early strength are high, stable long-term strength, can be applicable to all kinds of organic matter soft soil basement process; GX08 according to the difference of organic content, can regulate the volume of cement and GX08, reaches best solidification effect and economical effectiveness.

Embodiment

The present invention is further described in conjunction with the embodiments.

Following examples soil selects mucky soil in Zhejiang University Zijin'gang campus, and its performance index are in table 1 and table 2.The each moiety of GX08 solidifying agent and quality composition are see table 3.

In following instance, cement quality mark is cement and native mass ratio, and GX08 massfraction is the ratio relative to cement.

Embodiment 1

Get the Muddy Bottoms soil sample that organic content is 3.27%, before the test, remove soil sample impurity, take 600g soil sample, add GX08 solidify material by the proportioning of table 3, the mass ratio of GX08 is 17.43%, and cement quality ratio is 17.62%, mixture is stirred and makes the right cylinder parallel sample of 3 φ 39.1 × 80mm, normal curing.The 7 day length of time, average intensity can reach 0.808MPa, and the average intensity of 28 days can reach 891kPa; During the 7 day length of time, be 17.43% when cement mixing content is 7.93%, GX08 volume, just can reach the 150kPa intensity of engine request; Cement mixing content is increased to 9.21%, just can reach 300kPa.

Embodiment 2

Get the Muddy Bottoms soil sample that organic content is 6%, before the test, remove soil sample impurity, take 600g soil sample, add GX08 solidify material by the proportioning of table 3, the mass ratio of GX08 is 17.58%, and cement quality ratio is 18.52%, mixture is stirred and makes the right cylinder parallel sample of 3 φ 39.1 × 80mm, normal curing.The 7 day length of time, average intensity can reach 807kPa, and the average intensity of 28 days can reach 905kPa; During the 7 day length of time, be 17.58% when cement mixing content is 8.37%, GX08 volume, just can reach the 150kPa intensity of engine request; Cement mixing content is increased to 9.66%, just can reach 300kPa.

Embodiment 3

Get the Muddy Bottoms soil sample that organic content is 10%, before the test, remove soil sample impurity, take 600g soil sample, add GX08 solidify material by the proportioning of table 3, the mass ratio of GX08 is 19.12%, and cement quality ratio is 19.72%, mixture is stirred and makes the right cylinder parallel sample of 3 φ 39.1 × 80mm, normal curing.The 7 day length of time, average intensity can reach 734kPa, and the average intensity of 28 days can reach 868kPa; During the 7 day length of time, be 19.12% when cement mixing content is 9.77%, GX08 volume, just can reach the 150kPa intensity of engine request; Cement mixing content is increased to 11.14%, just can reach 300kPa.

Embodiment 4

Get the Muddy Bottoms soil sample that organic content is 14%, before the test, remove soil sample impurity, take 600g soil sample, add GX08 solidify material by the proportioning of table 3, the mass ratio of GX08 is 19.90%, and cement quality ratio is 20.04%, mixture is stirred and makes the right cylinder parallel sample of 3 φ 39.1 × 80mm, normal curing.The 7 day length of time, average intensity can reach 569kPa, and the average intensity of 28 days can reach 740kPa; During the 7 day length of time, be 19.90% when cement mixing content is 11.96%, GX08 volume, just can reach the 150kPa intensity of engine request; Cement mixing content is increased to 13.63%, just can reach 300kPa.

Embodiment 5

Get the Muddy Bottoms soil sample that organic content is 16.73%, before the test, remove soil sample impurity, take 600g soil sample, add GX08 solidify material by the proportioning of table 3, the mass ratio of GX08 is 20.25%, and cement quality ratio is 19.52%, mixture is stirred and makes the right cylinder parallel sample of 3 φ 39.1 × 80mm, normal curing.The 7 day length of time, average intensity can reach 398kPa, and the average intensity of 28 days can reach 590kPa; During the 7 day length of time, be 20.25% when cement mixing content is 14.22%, GX08 volume, just can reach the 150kPa intensity of engine request; Cement mixing content is increased to 16.56%, just can reach 300kPa.

Claims

1. the application of muck soil composite curing agent in the process of organic matter soft soil solidification of the foundation, it is characterized in that, realized by following steps: form solidify material by following component by mass percentage: plaster stone 28.21%, unslaked lime 22.05%, sodium carbonate 8.26%, FDN11.58%, water glass 29.44%, trolamine 0.47%, get the Muddy Bottoms soil sample 600g that organic content is 3.27%, add above-mentioned solidify material, the mass ratio of solidify material is 17.43%, cement quality ratio is 17.62%, mixture is stirred, wherein cement quality mark is cement and native mass ratio, solidify material massfraction is the ratio relative to cement.

2. the application of muck soil composite curing agent in the process of organic matter soft soil solidification of the foundation, it is characterized in that, realized by following steps: form solidify material by following component by mass percentage: plaster stone 28.21%, unslaked lime 22.05%, sodium carbonate 8.26%, FDN11.58%, water glass 29.44%, trolamine 0.47%, get the Muddy Bottoms soil sample 600g that organic content is 6%, add above-mentioned solidify material, the mass ratio of solidify material is 17.58%, cement quality ratio is 18.52%, mixture is stirred, wherein cement quality mark is cement and native mass ratio, solidify material massfraction is the ratio relative to cement.

3. the application of muck soil composite curing agent in the process of organic matter soft soil solidification of the foundation, it is characterized in that, realized by following steps: form solidify material by following component by mass percentage: plaster stone 28.21%, unslaked lime 22.05%, sodium carbonate 8.26%, FDN11.58%, water glass 29.44%, trolamine 0.47%, get the Muddy Bottoms soil sample 600g that organic content is 10%, add above-mentioned solidify material, the mass ratio of solidify material is 19.12%, cement quality ratio is 19.72%, mixture is stirred, wherein cement quality mark is cement and native mass ratio, solidify material massfraction is the ratio relative to cement.

4. the application of muck soil composite curing agent in the process of organic matter soft soil solidification of the foundation, it is characterized in that, realized by following steps: form solidify material by following component by mass percentage: plaster stone 28.21%, unslaked lime 22.05%, sodium carbonate 8.26%, FDN11.58%, water glass 29.44%, trolamine 0.47%, get the Muddy Bottoms soil sample 600g that organic content is 14%, add above-mentioned solidify material, the mass ratio of solidify material is 19.90%, cement quality ratio is 20.04%, mixture is stirred, wherein cement quality mark is cement and native mass ratio, solidify material massfraction is the ratio relative to cement.

5. the application of muck soil composite curing agent in the process of organic matter soft soil solidification of the foundation, it is characterized in that, realized by following steps: form solidify material by following component by mass percentage: plaster stone 28.21%, unslaked lime 22.05%, sodium carbonate 8.26%, FDN11.58%, water glass 29.44%, trolamine 0.47%, get the Muddy Bottoms soil sample 600g that organic content is 16.73%, add above-mentioned solidify material, the mass ratio of solidify material is 20.25%, cement quality ratio is 19.52%, mixture is stirred, wherein cement quality mark is cement and native mass ratio, solidify material massfraction is the ratio relative to cement.